Calling device



July 27, 1926. v 1,593,992

P. C. SMITH CALLING DEVICE Filed Dec. 29, 1922 2 Sheets-Sheet l July 27 1926.

P. 0. SMITH CALLING DEVICE Filed Dec. 29, 1922 2 Sheets-Sheet 2 Hill Patented July 27, 1926.

UNITED STATES eArEN-rirosncamm c. s'mrn, or EAST ensues, un'w masam'assfeuoit rewnsr'nitu ntscrm'c comm, mcoarona'rn'u, or

new Yoax, N. Y., A eoaronarrou oir-unw Yonx.

' car-1.11m DEVICE. I

Application med December 29, 1922. serial-Re. mm.-.

This invention relates to calling devices,

a and more particularly to impulse senders for automatic or semi-automatic telephone systerms in which the selector switches used for the building up of a connection are directively controlled by current impulses sent from a subscribers station or from an operators position. v

A subscriber often finds it necessary to call certain other subscribers quite frequently. For example, a broker may wish to call a lar e number of his customers each morning, ollowing the opening of the market, to apprise them of market conditions. To call each of these regular customers daily by the usual manipulation of the finger wheelof his callin dial entails a considerable efiort, since 1t is necessary to o erate the dial septi rately for each digit 0? each line designaion.

It is therefore the object" of this invention to provide a new and improved calling device which may be employed in the customary manner for dialin line designations and which may be emp oyed to send the complete designation of certain lines by a single actuation.

This object is attained by the employment of a card which is perforated in accordance with the several digits of a particular line designation to be called, and which is adapted for insertion behind the finger wheel of a calling device such as the calling dials at present in use in various cities of this country. pressed and rotated to its full extent, certain pulsing pins arranged 'in a plurality of digital groups are forced by the card. in accordance withthe erforations therein, into the path of impu se transmitting springs, so that durin the return of the dial to its normal position the operated pulsing pins cause the transmission of a set of impulses -oneach actuatmn of the finger w eel when no card'i's used. 7 n

One embodiment of the invention is showndrawings.

in the accom an 'n p yl g of a calling dial.

Fig. 1 is a top view Fig. 2 is a cross-sectional view of the dial when adjusted to call a line designationby successive rotations ot the finger wheel with a portion thereof cut away.

When the finger wheel is then de- Fig. 3- is across-sectional side view of the dial when adjusted to call a line desi nation by a single rotation of the finger w eel. Fig. 4 is a top view of the dial mechanism Fig. 5 is a front view of the dial mechanism with a portion of the casing cut away. Fi 6 shows a card adapted for use with the 'al.

The dial comprises a cylindrical casing 5,

set upon a base 6, in the central portion of which is formed a boss 7 into which a central rod 8 is threaded. A sleeve 9 integral with a supporting disc 10 is rotatably mounted about rod 8. A finger wheel 12 having ten finger holds 13 is carried by a shaft 14 which is rotatably and depressibly mounted on rod 8 and extends downwardly over the top of sleeve 9. A coil sprin 11 contained within the shaft 14 surroun ing rod 8, engages the end of the sleeve 9 and normally holds the finger wheel 12 in its outer position against the head 15 of rod 8. A motor spring 17 with its outer end attached to disc 10. and its inner end fastened to boss 7, is provided to restore the dial mechanism after it has been rotated by the actuation of the finger wheel 12. A notch 18 is formed in the periphery of the fin er wheel 12 which allows it to be depressed below a roller 19, attached to the casing 5, and which is adapted to. maintain the finger wheel in a depressed condition against the action of spring 11 during rotation ofthe finger whee and until the notch again registers with the roller 19.

Mounted on shaft 14 and movable therewith is a pulsing cam 20 having ten projections thereon which actuate contact springs 21 by means of latch and pressure members 22 and 23. The members 23 are carried by the rod 24 pivoted in the bracket 25, the bracket 25 beingattached in any suitable manner to the casing 5. Mounted between finger wheel 12 and cam 20, and supported by posts'26 on supportin disc 10, is an auxiliary pulsing member. 27. This member 27 comprises a number of, sets of depressible pulsing pins 28 ;--m the drawing. four groups (1, 2, 3, ,4) of ten pins each are shown. These pins are held mal positions by a spring spider 29 attached tothe member 27 andhaving a plurality of bifurcated arms 30 en aginlghthe inner ends of the pins respective e finger wheel has forty holes 31 therein through which On the depression of the finger wheel, shaft these pins may project when the finger 14 moves inwardly on rod 8 and carries the wheel is depressed (as shown in Fig. 3) pulsing cam 20Iout of engagement with the In the space between the finger wheel and latch and pressure members 22 and 23 so the outer ends of the pins there maybe inthat the rotation" of this cam will not be serted a card 32 having perforations therein effective. At gthe same time, certain of the corresponding to only certain. ones of the pins which do not project through openpulsing pins 28 so as to depress one or more ings on card 32, are pushed inwardly by the pins in each group when it is inserted in card so that they are in the plane formerly the dial and pressed against the pins. The occupied by the pulsing cam 20. By the op-' card 32 shown in Fig. 6 has six perforations eration of lever 45, the governor drum is in group 1, seven in group 2, eight in group now shifted to a position such that the fly 3, and nine in group 4. This card is held in Weights engage the bearing surface 48 was an adjusted position on the dial by means of to retard the speed of the finger wheel. and a'bracket 52 secured on the under surface of hereby the impulse pins 28 during it 1' the finger wheel by means of screws 53. turn movement. If the card shown in Fig. A two-speed governor comprising a gov- 6 is used, this single actuation of the finger ernor shaft 34 and fiy-weights 35, is oper- Wheel will call the line designation 4321, as ated by a worm wheel 36 through the med'ifour pins in the first group, three in the secum of a Worm 37 on shaft 34. The worm 0nd, two in the third, and one in the fourth wheel 36 is operated by a ratchet member group will be depressed so that as the finger 38 attached to a pin 39 on disc 10 and tenwheel slowly rotates on its return movesioned against wheel 36 by a coil spring 40. ment, these pins will actuate contact springs By this mechanism, the worm wheel 36 is 21 in the same manner that pulsing cam 20 rotated only upon a counter-clockwise movewould have done if this number had been ment of the finger wheel. An angled lever dialed in the normal manner by four rota- 45 is pivoted on a pin 46 extending from an tions of the finger wheel.

ear 44 of bracket 25 and carries at one end The invention, of course, is not limited portion a roller 50 which bears against the to the specific apparatus shown but only by inner surface of cam 20. The other arm of the'scope of the appended claims.

lever 45 is slidably attached to the governor The invention claimed is:

drum by pins 42. This lever operates to 1- A calling device comprising a finger shift the governor drum on th haft, 34 wheel, means for normally transmitting imupon, the depression of finger wh l 12, pulses corresponding to the several digits of Two annular bearing surfaces 48 and 49 are l ne designation in response to a plurality rovided forthe fi -weights. These weights of selective actuations of the finger wheel, ear normally against bearing surface 49.. and means to render the before mentioned having a comparatively small diameter, but e n n iv and o cause the trans bear against bearing surface 48 having a mission of impulses corresponding to the comparatively large diameter upon the digits of-a complete line designation in reshifting of the drum; so that in the latter. Sponse to a single actuation of the finger case the speed of the return of the finger l wheel will be considerably retarded. It will- In a c lling device, afinger wheel, be understood that the springson which the y transmitting impulses flyweights ar nt d h ld b li ht corresponding to the several digits of a line springs such as are ordinarily used in comdesignation in response to plurality of mercial dials. With such springs the braklective actuations 0f the finger Wheel, a ing action increasesv as the square of the p Whlch the Complete. line design radius f m ,th haft t th b ki tion is recorded, and means cooperating with faces, said member to render the said first means Wh i th normal e ti f th ineffective, and to-cause the transmission of dial, a line designation is called by sucessive Impulse?" corresp9nd'mg to P designation rotations of the finger wheel, the governor l'ecorded p Sald member In response to a drum will be in its normal position with gl actuation of t e fi ger heel. the fly-weights bearing against bearing sur- 3- A calling device comprising means for face 49 thereof, and the pulsing cam 20' will normally calling a line designation by a operate the contact springs 21 generally at number of selective. actions, a perforated the rate of 10 pulses er second through the card adapted to be inserted in said calling medium of latch and and 23. In case, however, it, is desired to perforated card for renderin ineffective pressure members 22 advice, and means cooperating with the 126 repeatedly call a. certain line designation said normal calling means an for calling a card similar to the one shown in Fig. 6 is the line designation by a single selective prepared. This card is inserted in the guide action. w a 52 and the finger wheel .is depressed and ro- 4. In a telephone system in:'whi ch nortates to its ll extent beneath roller 19, mally a number of selective actions have to be performed by a calling party to effect a connection, calling apparatus, a card to be inserted therein, and means positioned by said card for effecting a connection by a single selective action on the part of the calling party.

5. In an impulse sender, actuating means,

contact springs, a perforated card, andmeans adapted to be set according to the perforations of said card for actuating the contact springs by a single operation of the actuating means.

6. In a calling device contact springs, an impulse cam for operating said contact springs, means to actuate said cam to transmit any one of a series of groups of impulses, a card to be inserted in said calling device, and means cooperating with the card to operate said springs to transmit said series of impulse groups independently of the operation of said cam.

7. In a calling device contact springs, a plurality of sets of pulsing pins normally movable ineffectively with respect to said springs, a card havin perforations thereon corresponding to certain of the pulsing pins, and means to move said card to render said pins effective with respect to said contact springs.

8. In a calling dial, a finger wheel, contact springs, pulsing means to normally operate the contact springs to transmit a single group of impulses by a single operation of the finger wheel, pulsing means comprising depressible pins to operate the contact springs to transmit a number of grou s of impulses by a single operation of the ger wheel, and means comprising the finger wheel for bringing either of said pulsing means into operation.

9. In a calling dial, a finger wheel, contact springs, a pulsing cam to normally operate the contact springs upon the rotation of the finger wheel so as to transmit a single group of impulses, depressible pins to operate the contact springs upon the rotation of the finger wheel to transmit a number of groups of impulses, a card to be inserted between said finger wheel and the depressible pins, perforations in the card cor-' responding to certain of the pins, means comprising the finger wheel to render the pulsing cam inoperative and to cooperate with said card to depress certain of' said pins whereby those of the pins for which there are no perforations on the card will be rendered operative, and means for maintaining said last mentioned means operative until said groups of impulses have been completely transmitted.

10. In a calling dial, a finger wheel, contact springs, pulsing means to operate the contact springs so as to transmit a series of impulses by successive operations of the finger wheel, a perforated card capable of being inserted in the dial, and a second pulsing means cooperating with the perforated card to transmit said series of impulses by a single operation of the finger wheel.

11. In a calling dial, a finger wheel, contact springs, pulsing means to operate the contact springs so as to transmit a series of impulses by successive operations of the finger wheel, a perforated card capable of being inserted in the dial, a second pulsing means cooperating with the perforated card to transmit said series of impulses by a single operation of the finger wheel, and a twospeed governor associated with each of said pulsing means.

12. In a calling dial, a finger Wheel, contact springs, a pulsing cam to normally operate the contact springs upon the rotation of the finger wheel so as to transmit a single group of impulses, depressible pins to operate the contact springs upon the rotation of the finger wheel so as to transmit a number of groups of impulses, a card to be inserted between the finger wheel and the depressible pins, perforations in the card corresponding to certain of the pins, means comprising a finger wheel for depressing the pulsing cam and the card so that the pulsing cam will be rendered inoperative while those of the pins for which there are no perforations on the card will be rendered operative, means for maintaining these members depressed until said groups of impulses have been completely transmitted by said contact springs, a governor member comprising fly-weights and bearing surfaces therefor, and means for causing the flyweights to bear upon one of said surfaces when the pulsing cam is operative and upon the other of said surfaces when the pulsing pins are operative. I

In witness whereof I hereunto subscribe my name this 26th day of December PERCY 0. SMITH. 

